Patent US2740710A successfully refreshed from Google Patents.
US2740710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of iron, nickel, cobalt, manganese, and chromium from their ores
Assignee: Individual
•
Filing: 1952-02-19
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Granted: 1956-04-03
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Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Johannsen Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:18
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD FOR THE REDUCTION OF OXIDIC IRON ORES AND PARTICULARLY ORES CONTAINING OXIDES OF NICKEL, COBALT, CHROMIUM, MANGANESE, BY THE ACTION OF A CARBON RICH IRON ALLOY IN A REVERVERATORY FURNACE, THE ORE BEING CHARGED AT THE ONE END OF THE FURNACE, THE FORMED SLAG BEING DISCHARGED AT THE OTHER END THEROF AND THE SLAG BEING PASSED THROUGH THE FURNACE AS A THIN LAYER OVER THE UNDERLYING BATH OF THE CARBON RICH IRON ALLOY COMPRISING CHARGING A MIXTURE OF THE OXIDIC ORE AND OF THE CARBON REQUIRED FOR ITS REDUCTION ONTO SAID IRON BATH IN THE FORM OF BRIQUETTES AND BLOWING THE OXYGEN CONTAINING GASES REQUIRED FOR THE COMBUSTION OF THE REDUCTION GASES THROUGH THE BRIQUETTE LAYER INTO THE FURNACE.
Claim 2
Independent Claim
121 words
A METHOD FOR THE REDUCTION OF OXIDIC IRON ORES AND PARTICULARLY ORES CONTAINING OXIDES OF NICKEL, COBALT, CHROMIUM, MANGANESE, BY THE ACTION OF A CARBON RICH IRON ALLOY IN A REVERVERATORY FURNACE, THE ORE BEING CHARGED AT THE ONE END OF THE FURNACE, THE FORMED SLAG BEING DISCHARGED AT THE OTHER END THEROF AND THE SLAG BEING PASSED THROUGH THE FURNACE AS A THIN LAYER OVER THE UNDERLYING BATH OF THE CARBON RICH IRON ALLOY COMPRISING CHARGING A MIXTURE OF THE OXIDIC ORE AND OF THE CARBON REQUIRED FOR ITS REDUCTION ONTO SAID IRON BATH IN THE FORM OF BRIQUETTES AND BLOWING THE OXYGEN CONTAINING GASES REQUIRED FOR THE COMBUSTION OF THE REDUCTION GASES THROUGH THE BRIQUETTE LAYER INTO THE FURNACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |